Capture transactional data from SATP connectors

[RafaelAPB]

Capture transactional data from a gateway session and attribute a caseid for each cross-chain transaction. See how Hephaestus works and developed code. However we need to change the code a bit.

At every gateway session, we now need to do a few things, according to the following requirements:

Requirements:

1. For each session (representing one cross-chain transaction), assign a case ID to the cross-chain transaction (which is the session ID).
2. Get transactional data from all the blockchain transactions issued (successful and failed)
3. Process the transactions according to Hephaestus. Assign the corresponding case ID / timestamps / blockchain ID/ etc to all of them.
4. Implement endpoint to export transactional data in JSON and CSV formats (so Hephaestus can create cross-chain models)

[brunoffmateus]

I will do this task.